System Part - JVC XV-BP1UB Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

3. SYSTEM PART

POWER on
"HELLO
PLEASE WAIT"
Display on VFD
OK?
YES
"READING"
Display on VFD
OK?
YES
System part OK
CN501,
NO
Pin18:+5.3VA, Pin3:-29VA,
Pin17: -27V, Pin13:
-24V?
X501 10MHz
OK?
R516
About 625kHz Serial
Clock OK?
R523
about 500kHz
OK?
DIG501 Change
CN701,
Pin5: 12V, Pin7:5V,
Pin2:2.2V, Pin11:
5.3VA?
CA207: 5.3VA,
CA210: 1.2V
CA211 : 5V
X301 : 27MHz
OK?
X302 : 25MHz
OK?
Check IC301
3-33
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check SMPS
X501 Change
IC501 Change
IC502 Change
Timer Board
Check SMPS
IC202, IC203,
IC204 Change
X301 Change
X102 Change
Main Board